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tonight on "nightline" -- >> this really has hit me like a train. >> amanda knox speaks for the first time since finding out she's been convicted of murder. from not guilty to guilty again. >> i will never go willingly back. i'm going to fight this until the very end. >> can she fight it? or is she one step closer to serving nor prison time? >> chips, pizza, wings. super bowl weekend is mouth watering close when we eat more in a few hours than almost any other time of the year. but is there a smarter way to gorge?

it's one food fight you don't want to mis. "nightline's" food confidential. and from super bowl snacks to super bowl halftime. it's baby bruno. what a treasure. you'll never guess how this year's performer got his start?

>> good evening and thanks for joining us. tonight, seattle college student amanda knox speaking out for the first time since that bombshell guilty verdict, a reversal that once again puts her freedom in jeopardy. for the past 6 1/2 years, her fate has been in the hands of the italian justice system. guilty, not guilty, and now guilty again. but tonight, she comes out strong saying she's not about to give up her fight. and in her first and only

interview since the surprising new verdict, here's abc's olivier vargas. >> it was a moment of raw anguish, amanda knox clearly shaken by the news. an italian court had convicted her for a second time of murder. >> i was with my family and i actually was able to find an italian tv station online. my first reaction was no, this is wrong and i'm going to do everything i can to prove that it is. >> nearly 28 months after being acquitted of killing british roommate meredith kercher while both were studying in perugia, italy, another reversal of fortune. amanda was sentenced to 28 1/2 years in prison. her italian boyfriend of one week was given 25 years. >> this really has hit me like a train. i did not expect this to happen.

i really expected so much better from the italian justice system. they found me innocent before. how can they say that it's guilt beyond a reasonable doubt. >> knox vowed to keep fighting, a fight that's already gone on for 6 1/2 years. next, her lawyers will wait for the court's reasoning. and then another appeal. >> we have to go to the supreme court. we have to understand the motivation behind what happened, and that happens within 90 days. >> reporter: but could she be ultimately extradited to italy? >> are you prepared for that? >> i'm not. i will never go willingly back to the place where i -- >> if italy's highest court upholds this ruling, amanda knox is a convicted murderer in italy. they are going to say we want her back on our soil. the u.s. is going to have to make a difficult decision. because in most cases where someone has been convicted of

murder, the u.s. would extradite them. >> reporter: ted simon is amanda's u.s. attorney and he argues she's already been found innocent. how did this jury, this panel of judges come up with a different verdict? come up with guilty beyond a reasonable doubt. >> i think to a logical mind it's somewhat incomprehensible because there's no meaningful difference. there's no new evidence and there's certainly not any new favorable evidence for the prosecution. >> amanda was home in seattle with her family when the verdict came. >> i hear the word guilty, i understood that won one in italian. of course, you know, all of our hearts sank. >> from the start, the knoxs has been cutting in a nightmare. they sent their young daughter off for a dream year abroad studying italian. never thinking act the vast differences between the two legal systems in italy and the u.s. >> in the italian system, you can actually have new trials in the appellate court. and that's what happened here. >> if you're accused of a crime

in italy, you are in big trouble. guilty until proven innocent. another proven here that amanda and rafaelle, they only had alibis for each other. >> knox an solecito were soon arrested. >> overnight, knox became a murder suspect and an international media obsession. in december 2009, the two were convicted of murder after a dramatic year-long trial. a trial full of character accusations against knox. and full of shifting motives. there were no eyewitnesses and no physical evidence. the prosecutor pinned his case on minute amounts of dna found on a kitchen knife they claimed was the murder weapon, a fact that was essentially ruled out in the most recent case. in the first trial, knox was sentenced to 26 years in prison.

the verdict devastated her family. >> anger, disbelief on how a judicial system could even come up with a verdict like this. it's beyond me. >> this is completely unjust and i'm in complete shock. >> reporter: the knox family made dozens of trips overseas and spent every penny that they had. more than $1 million fighting the charges. finally an appeals court agreed to take up the case, casting doubt on the evidence and pointing to shoddy police work. near the end of that second trial, i confronted the prosecutor on the street. >> do you have a moment, please? >> reporter: after his initial reluctan reluctance -- just one moment. the prosecutor relented. >> why are you asking for life? >> they killed with no motive. the law dictates they must go to prison for life. >> reporter: but then a dramatic

decision. the appeals court overturned amanda's conviction. she flew home to seattle. >> what's important for me to say is just thank you to everyone who has believed in me. >> reporter: then just as knox was beginning her new life, italy's highest court overturned the acquittal last year. amanda couldn't believe it. >> i'm going to keep fighting this. i'm going to keep fighting this and i'm not going to stop fighting this. that's all. the truth will come out and that's all. >> reporter: today, that truth is that she again stands convicted. for meredith kercher's family, whatever the courts ultimately decide, this will never really be over. >> we're stl onill on a journey the truth. and it may be the fact that we don't ever really know what happened that night. >> reporter: today, amanda acknowledged the kercher's pain.

>> i just want them to know that i really understand that this is incredibly difficult. they have also been on this never ending thing, and that when the case has been messed up so much, like a verdict is no longer consolation for them. and that just the very fact that they don't know what happened is horrible. >> reporter: one more twist today in a case that has had so many. rafaelle solecito traveling with his new girlfriend in northern italy was stopped by police. he was allegedly trying to cross the border into austria. his passport was taken, but he was released and remains free for now. >> solecito is in a tougher spot, because he's an italian citizen. and he doesn't have the protections of another country to go to, force an extradition

fight. so without the ability to force an extradition fight, he could very well be serving time for this crime. >> he is vulnerable. and i don't know what i would do if they imprisoned him. it's maddening. >> amanda and her family had hoped their nightmare would end with this latest verdict. inste instead, they vow to fight to clear her name. >> reporter: is this young woman ever going to be free of this, do you think? >> it's certainly going to go on for a long time with no resolution near sight. >> reporter: who knew one year abroad could lead to what could be a lifetime ordeal. >> i'm going to fight this until the very end. and it's not right and it's not fair. >> reporter: for "nightline," i'm elizabeth vargas in new york. up next for us, we're having

our very own food fight to make our game time decisions about super bowl eats. ♪ oh-oh, oh, oh, la, la-la, la-la, la-la ♪ ♪ na-na-na, na-na-na-na-na some things just go together, like auto and home insurance. bundle them together at progressive, and you save big on both. ♪ oh, oh-oh, oh, oh hey, it's me! [ whistles ] and there's my dog! [gasps] there's my steps! i should stop talking. perfectly paired savings. now, that's progressive.

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the super bowl. the high gloss commercials, those high kwal ree muncalorie . besides thanksgiving, it's the single biggest calorie day of the year. but certain snacks are higher in calories and snacks than others. if you could choose t better one you should, if only because

then you can eat more. you're invited to the "nightline" super bowl party. it's super bowl weekend and everyone is prepping for a party. even us. this is your all access pass tonight line's super bowl showdown. we're comparing game day staples, all those salty, savory treats we grab during the game. but before you chug a beer and chow down, think twice. simple swaps can help you avoid a calorific nightmare. we huddle with our food coach, author of "eat it to beat it." he's going to help save you up to 1,000 calories without resorting to rabbit food. so let's start with the pregame. what should we be careful of? >> first thing you want to do is drink some water before the game. >> so you have to pregame before the pregame. >> the idea of drinking water is if you're already hydrated then you're going to drink less alcohol? >> exactly.

and eat less as well. a lot of people mistake being hungry when they're thirsty. >> right. >> but water is not what most people are drinking for the game. on average, americans buy 51.7 million cases of beer on game day. that's enough for four bottles of brew for every man, woman and child in the usa. >> beer is synonymous with football it seems. if a girl is offered a dark beer and aless dark beer, which way do we go? >> go for the dark side. >> really? i always assumed the darker beer has more calories. >> it's counterintuitive but you were wrong. >> cheers. >> of course, you're going to want chips with all that beer. in fact, football fans will munch on a whopping 8.2 million pounds of tortilla chips alone on sunday. not every corn chip are created equal. these frito's are 160 calories were serving. these are 120. >> that's amazing. >> you don't want to leave that snack naked.

but before you dip that chip, should you go cheesy or creamy. >> in this case, you have newman's own queso, which is cheese and salsa. up against the spinach artichoke dip. e we're talking about a ten calorie difference per chi. -- chip. go with the queso. >> the chips are so you'll eat more dip. >> yes. that's what's happening here. >> and we're just geing started. more appetizers, anyone. >> if offered a bread stick or a cheese stick, go with the protein.. >> i know it's counterintuitive. you're saving over 200 calories. this is 370 calories per four pieces. here, four piece, 580 calories. so 210 calories for every four pieces. >> the first half is up. we're serving up wings.

because who doesn't want some wings with their super bowl football viewing? >> in fact, they're so popular, by the time the whistle blows at the bd of game day, fans will chomp down 1.23 billion wings. that's billions with a "b." >> you have to choose carefully. these wings, 690 calories per eight pieces. >> that's a lot. >> this one, 1,590 per eight pieces. >> that's crazy. >> you're going from the hooter's wings over to, you know, the outback wings and you're picking up 900 calories. that's over 110 calories per wing. >> once you polish off the wings, time for the main course. pizza pie. twice as many pizzas are sold on super bowl sunday than on any other day. >> you're calling dominos and saying give me a brooklyn style sausage pizza. don't do it.

get the brooklyn style hawaiian. here's why. here you're getting ham and pineapple. there you're getting sausage. the ham is a leaner meat. >> national chains like dominos are running game day specials. but if pizza just isn't your thing, how about mexican? this is the taco bell 12 pack. >> this is the taco bell taco supreme. girls make the mistake. oh, i'm going to have the taco salad, please. >> 780 calories and 42 grams of fat. >> oh, my gosh. that's a lot of fat. >> if you go with a double decker taco supreme. it's absolutely delicious and it's just 350 calories. >> that's incredible. >> and it's not just the calories. gra. s of fat count, too. >> this is literally twice the fat grams. it's incredible. >> 42 grams of fat, 16 grams of fat. >> now it's almost time to hit

the locker room. do you go for a slice of gridiron cake or rice chrkrispi treat. >> just 80 calories. probably have two or three of them and not add to the calories that you would get in chocolate cake. >> really? so it is lighter and fewer calories. >> it will fill you up, absolutely tasty. >> so if you're hosting a super bowl party, this is a good place to go. >> so all that's left to do is wait for the kickoff. i think we learned so much, right? we learned what to eat, what to avoid. it's the "nightline" super bowl party. may the best team win. go team. >> is it too early to start pregame snacking no uh? up next for us, treasure crooner bruno mars will be bringing down the house at the halftime show this super bowl weekend. but once upon a time, he was billed as the world's youngest professional elvis impersonator.

check out that pompador. trugglig with bipolar depression, there are treatment options. ask your doctor if once a day latuda, lurasidone hcl, may help you. in clinical studies, latuda has been shown to be effective for many people struggling with bipolar depression. latuda is not for everyone. call your doctor if you have unusual changes in mood, behaviors, or thoughts of suicide. antidepressants can increase these in children, teens, and young adults. elderly dementia patients taking latuda have an increased risk of death or stroke. call your doctor if you have fever, stiff muscles, and confusion, as these may be signs of a life-threatening reaction. or if you have uncontrollable muscle movements, as these may become permanent. high blood sugar has been reported with latuda and medicines like it. and in some cases, extreme high blood sugar can lead to coma or death. other risks include decreases in white blood cells, which can be fatal,

dizziness upon standing, seizures, increased cholesterol, weight gain, increased prolactin levels, impairment in judgment, or trouble swallowing. avoid grapefruit and grapefruit juice while taking latuda. use caution before driving or operating machinery. there are paths to treat bipolar depression. ask your doctor. if once a day latuda for bipolar depression is right for you. ♪ for savings options, visit latuda.com.

>> on tonight's "feed frenzy" you've come a long way, baby. who knew an elvis impersonator would grow up to be pop royalty himself? bruno mars having his best month ever. he's already won a grammy for best pop vocal album for unorthodox jukebox. and this weekend, he'll be the main music event at the super bowl. the treasure singer headlining the halftime show.

♪ treasure that is what you are ♪ >> and with moves like this, it's no surprise that this is where he got his start. as a pint sized elvis impersonator in the early '90s. ♪ >> check out that snarl, that swagger. on this very piece of treasure, those moves came naturally to baby bruno. he was in the movies. here's the budding star in "honeymoon in vegas." ♪ falling in love with you >> and on tv, interviewed by pauly shore at the tender age of 4. we think his 4-year-old self would be mighty pleased. >> when i grow up, i want to be just like elvis. >> and all shook up by all his success.